Diff: MB85RSxx_SPI.cpp

Revision:

0:f397b42257f8

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MB85RSxx_SPI.cpp	Mon Apr 24 14:03:41 2017 +0000
@@ -0,0 +1,165 @@
+/**
+ ******************************************************************************
+ * @file    MB85RSxx_SPI.cpp
+ * @author  Toyomasa Watarai
+ * @version V1.0.0
+ * @date    24 April 2017
+ * @brief   MB85RSxx_SPI class implementation
+ ******************************************************************************
+ * @attention
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "mbed.h"
+#include "MB85RSxx_SPI.h"
+
+MB85RSxx_SPI::MB85RSxx_SPI(PinName mosi, PinName miso, PinName sclk, PinName cs)
+    :
+    _spi(mosi, miso, sclk),
+    _cs(cs)
+{
+    uint8_t buf[4];
+
+    _cs = 1;
+    _spi.format(8, 0);
+    read_device_id(buf);
+    if ((buf[2] & 0x1F) > MB85_DENSITY_512K) {
+        _address_bits = 24;
+    } else {
+        _address_bits = 16;
+    }
+}
+
+MB85RSxx_SPI::~MB85RSxx_SPI()
+{
+}
+
+void MB85RSxx_SPI::frequency(int hz)
+{
+    _spi.frequency(hz);
+}
+
+void MB85RSxx_SPI::read_device_id(uint8_t* device_id)
+{
+    _cs = 0;
+    _spi.write(MB85_RDID);
+    for (int i = 0; i < 4; i++) {
+        *device_id++ = (uint8_t)_spi.write(0);
+    }
+    _cs = 1;
+}
+
+uint8_t MB85RSxx_SPI::read_status()
+{
+    _cs = 0;
+    _spi.write(MB85_RDSR);
+    uint8_t st = (uint8_t)_spi.write(0);
+    _cs = 1;
+    
+    return st;
+}
+
+void MB85RSxx_SPI::read(uint32_t address, uint8_t* data, uint32_t length)
+{
+    _cs = 0;    
+    _spi.write(MB85_READ);
+    if (_address_bits == 24) {
+        _spi.write((uint8_t)((address >> 16) & 0xFF));
+    }
+    _spi.write((uint8_t)((address >>  8) & 0xFF));
+    _spi.write((uint8_t)((address >>  0) & 0xFF));
+    for (uint32_t i = 0; i < length; i++) {
+        *data++ = (uint8_t)_spi.write(0);
+    }
+    _cs = 1;
+}
+
+uint8_t MB85RSxx_SPI::read(uint32_t address)
+{
+    uint8_t data;
+
+    _cs = 0;
+    _spi.write(MB85_READ);
+    if (_address_bits == 24) {
+        _spi.write((uint8_t)((address >> 16) & 0xFF));
+    }
+    _spi.write((uint8_t)((address >>  8) & 0xFF));
+    _spi.write((uint8_t)((address >>  0) & 0xFF));
+    data = (uint8_t)_spi.write(0);
+    _cs = 1;
+    
+    return data;
+}
+
+void MB85RSxx_SPI::write(uint32_t address, uint8_t* data, uint32_t length)
+{
+    _cs = 0;
+    _spi.write(MB85_WRITE);
+    if (_address_bits == 24) {
+        _spi.write((uint8_t)((address >> 16) & 0xFF));
+    }
+    _spi.write((uint8_t)((address >>  8) & 0xFF));
+    _spi.write((uint8_t)((address >>  0) & 0xFF));
+    for (uint32_t i = 0; i < length; i++) {
+        _spi.write(*data++);
+    }
+    _cs = 1;
+}
+
+void MB85RSxx_SPI::write(uint32_t address, uint8_t data)
+{
+    _cs = 0;
+    _spi.write(MB85_WRITE);
+    if (_address_bits == 24) {
+        _spi.write((uint8_t)((address >> 16) & 0xFF));
+    }
+    _spi.write((uint8_t)((address >>  8) & 0xFF));
+    _spi.write((uint8_t)((address >>  0) & 0xFF));
+    _spi.write(data);
+    _cs = 1;
+}
+
+void MB85RSxx_SPI::fill(uint32_t address, uint8_t data, uint32_t length)
+{
+    _cs = 0;
+    _spi.write(MB85_WRITE);
+    if (_address_bits == 24) {
+        _spi.write((uint8_t)((address >> 16) & 0xFF));
+    }
+    _spi.write((uint8_t)((address >>  8) & 0xFF));
+    _spi.write((uint8_t)((address >>  0) & 0xFF));
+    for (uint32_t i = 0; i < length; i++) {
+        _spi.write(data);
+    }
+    _cs = 1;
+}
+
+void MB85RSxx_SPI::write_enable()
+{
+    _cs = 0;
+    _spi.write(MB85_WREN);
+    _cs = 1;
+}
+
+void MB85RSxx_SPI::write_disable()
+{
+    _cs = 0;
+    _spi.write(MB85_WRDI);
+    _cs = 1;
+}